Cassette



H. P. MAcLAGAN.

CASSETTE. APPLICATIQN FILED SEPT. 2!. 191a.

Patented Sept. 14,1920."

INVENTOR H3560!" P. MacLagan A'ITORNEY burrs STATES PATENT OFFICE.

HECTQR lengthens, on EARK RIDGE, ILLINOIS, ASSIGNOR 'IO MCINTOSH BATTERY earn errreatt on, on CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS,

CASSETTE.

Specification of Letters Patent.

Patented Sept. 14:, 1920.

Application filed September 21, 1918. Serial No. 255,212.

T all whom may concern Be it known that l, Hno'ron P. MAG- Lee/m, citizen of the United. States, residing at Park Ridge, in the county of Cook and State of Illinois, have invented a certain new and useful Ilmprovei'nent in Gas.

after the exposure.

My invention will best be understood by reremnoe to the accompanying drawings showing a preferred embodiment thereof in which Figure 1 shows the 'asse'tte in open condition in inside plan view,

.fi Q is a sectional. view of the parts shown in 1, taken along the line Z-2,

and i Fit-5. 3 is an enlarged sectional view similar l'e; Fig. 9. the dillenmce being that the Lvin'iilar numerals refer to similar parts tl'irougnout the sevcaal views.

shown in the drawings, the cassette of two plates of sheet metal and 11, these being preferably of aluminum of only sufficient thickness to give the necessary strength to the device. These plates are conncetod by hinges l2 so that they may be moved near each other in parallel relation or away from each other to open the cassette as desired. The hinges serve to maintain a. fixed. relation of engagement between the plates when they are brought together. The plate il is covered with a sheet of felt l l, preferably black in color, and on this felt two rectangular metal frames and 16 are secured by screws through the 'gyl-h plate 10 as indicated. u lame is o a size to fit and readily receive within it the dry plate for which the cassette ls dcsigned, it being desirable to use (ll'llGl'CIll) size cassettes for different size plates. The frame 15 is enough larger than the frame 16 to leave between the frames a groove substantially equal in cross sectioirto the cross section of the metal bar forming each of the frames 15 and 16. The plate ll is covered with a sheet'of felt 14, preferalglly black in color, and on the felt a rectangular frame of bar metal 17 is secured by screws through the plate ll as indicated. The fran'ie 17 is of substantially the size of the groove between the frames '15 and 16 and the metal bar forming the frame 17 is of substantially the cross section of the cross section of said groove, as a result of which, when the plates 10 and 11 are brought together the frame 17 its and substantially fills said groove, the proportions and disposition of the hinges 12 being such as to secure said relation of the fran'ies.

lVhen in closed condition, [he platesv lo and 11 are held together by U-shaped catches h pivotally secured to the edge portions of the plate 11 so that by moving said catches outwardly the plate ll is released and may be moved to its open position.

To readily remove the dry plate from the cassette after an exposure 1 provide a circular hole in the platc ll) inside of one corner of the frame 16, which hole is lillcd by a disk 15) of metal, yn'cfcrably of the same material and thickncss as the plate 1d. The disk loosely fits the holc containing it and is ccn'lented to the fell: 13 which pcrmits it to be pressed inward by thc liugcr sufficiently to lift the corncr of the dry plate, shown at 20 in Fig. 3, so that said plate is slightly above the frame 16 and may readily be grasped and removed.

A.) result of the construction dcscribcd it will appear that my c mstruclion has a thickness substantially equal to the com biucd thickness of the plates l and ll, the shcets of felt l3 and 14 and the dry plate 20, and that therefore the cassette may be made quite thin. The interciigagemcnt of the rectangular frames brovides as the only path along which light leakage can take place, a path having sharp right angle turns and this path is in large part obstructed by the felt engaging the frames. The fclt also scl'vcs to effectively seal the joints bctwecn the parts im-lluling-the joint around. the dis l9.

VVhiIe I have shown my invention in the particular embodiment above described, I do not limit myself to this construction, as I may employ any equivalent thereof known to the art at the time of the filing of this application, without departing fromthe scope of the appended claims.

What I claim is: e

1. In a cassette, the combination of two plates hinged together to lie adjacent each other in substantially parallel planes in closed position, rectangular frames conformed to nest in one another, alternate ones of said frames being secured to one of said plates and an intermediate one of said frames being secured to the other of said plates, sheets of light proof material on the inner surfaces of said plates between said plates and said frames, one of said plates having an aperture therein within the innermost of said frames, and a plug loosely fitting said aperture and secured to the ad jacent sheet of light proof material.

2. In a cassette, the combination of two plates hinged together to lie adjacent each other in substantially parallel planes in closed position, rectangular frames conformed to nest in one another, alternate ones of said frames being secured to one of said plates and an intermediate one of said frames being secured to the other of said plates, and sheets of light proof material on the inner surfaces of said plates between said plates and said frames, one of said plates having an aperture therein within the innermost of said frames for removing the dry platefrom the cassette.

3. In a cassette, the combination of two plates hinged together to lie adjacent each other in substai'lt-ially parallel planes in closed position, rectangular frames conformed to nest in one another, alternate ones of said frames being secured to one of said plates and an intermediate one of said fumes being secured to the other of said plates, and sheets of light proof material on the inner surfaces of said plates be tween said plates and said frames.

In a cassette, the combination of two plates hinged together to lie adjacent each other in substantially parallel planes in closed position, rectangular frames conformed to nest in one another, alternate ones of said frames being secured to one of said plates and an intermediate one of said frames being secured to the other of said plates, sheets of light proof felt on the inner surfaces of said plates between said plates and said frames, one of said plates having an aperture therein within the innermost of said frames, and a plug loosely fitting said aperture and secured to the adjacent sheet of felt.

5. Ina cassette, the combination of two plates hinged together to lie adjfacent each other in substantially parallel planes in' closed position, rectangular frames conformed to nest in one another, alternate ones of said frames being secured to one of said plates and an intermediate one of said frames being secured to the other of said plates, and sheets of light proof felt on the inner surfaces of said plates between said plates and said frames, one of said plates having an aperture therein within the innermost of said frames for removing the dry plate from the cassette.

6. In a cassette, the combination of two plates hinged together to lie adjacent each other in substantially parallel planes in closed position, rectangular frames conformed to nest in one another, alternate ones of said frames being secured to one of said plates and an intermediate one of said frames being secured to the other of said plates, and sheets of light proof felt on the inner surfaces of said plates between said plates and said frames. v

7. In a cassette, the combination of two plates, devices carried by said plates for forming a light proof dry plate receptacle between said two plates, one of said plates having an. aperture therein communicating with said receptacle, and flexible light proof material carried by said one plate covering said aperture.

8. In a cassette, the combination of two plates, devices carried by said plates for forming a light proof dry plate receptacle between said plates, one of said plates having an aperture therein communicating with said receptacle, flexible light proof material carried by said one plate covering said aperture, and a plug loosely fitting said aperture and secured to said flexible material.

9. In a cassette, the combination of two plates, devices carried by said plates for forming a light proof dry plate receptacle between said plates, one of said plates having an aperture therein communicating with said receptacle, flexible light proof material carried by said one plate covering said aperture, and catches for holding said plates adjacent each other to close said receptacle.

10. In a cassette, the combination of two plates hinged together to lie adjacent each other in substantially parallel planes in closed position, and continuous rectangular frames conformed to nest in one another, a first one of said frames being secured to one of said plates and another of said frames fitting said first frame being secured to the other of said plates and forming a light proof dry plate receptacle within said frames when the cassette is closed In witness whereof, I hereunto subscribe my name this 16th day of September, A. D.

1918. HECllOR P. MAoLAGAN. 

